Han Yi, Oh Seokhoon, Wang Xiao-Yong, Lin Run-Sheng
Department of Integrated Energy and Infra System, Kangwon National University, Chuncheon-si 24341, Korea.
Department of Architectural Engineering, Kangwon National University, Chuncheon-si 24341, Korea.
Materials (Basel). 2021 Dec 28;15(1):204. doi: 10.3390/ma15010204.
At present, reducing carbon emissions is an urgent problem that needs to be solved in the cement industry. This study used three mineral admixtures materials: limestone powder (0-10%), metakaolin (0-15%), and fly ash (0-30%). Binary, ternary, and quaternary pastes were prepared, and the specimens' workability, compressive strength, ultrasonic pulse speed, surface resistivity, and the heat of hydration were studied; X-ray diffraction and attenuated total reflection Fourier transform infrared tests were conducted. In addition, the influence of supplementary cementitious materials on the compressive strength and durability of the blended paste and the sustainable development of the quaternary-blended paste was analyzed. The experimental results are summarized as follows: (1) metakaolin can reduce the workability of cement paste; (2) the addition of alternative materials can promote cement hydration and help improve long-term compressive strength; (3) surface resistivity tests show that adding alternative materials can increase the value of surface resistivity; (4) the quaternary-blended paste can greatly reduce the accumulated heat of hydration; (5) increasing the amount of supplementary cementitious materials can effectively reduce carbon emissions compared with pure cement paste. In summary, the quaternary-blended paste has great advantages in terms of durability and sustainability and has good development prospects.
目前，减少碳排放是水泥行业亟待解决的问题。本研究使用了三种矿物掺合料：石灰石粉（0-10%）、偏高岭土（0-15%）和粉煤灰（0-30%）。制备了二元、三元和四元浆体，研究了试件的工作性、抗压强度、超声脉冲速度、表面电阻率和水化热；进行了X射线衍射和衰减全反射傅里叶变换红外测试。此外，分析了辅助胶凝材料对混合浆体抗压强度和耐久性的影响以及四元混合浆体的可持续发展情况。实验结果总结如下：（1）偏高岭土会降低水泥浆体的工作性；（2）添加替代材料可促进水泥水化并有助于提高长期抗压强度；（3）表面电阻率测试表明，添加替代材料会增加表面电阻率值；（4）四元混合浆体可大幅降低水化热累积量；（5）与纯水泥浆体相比，增加辅助胶凝材料用量可有效减少碳排放。综上所述，四元混合浆体在耐久性和可持续性方面具有很大优势，具有良好的发展前景。
